> It certainly seems like if it's worthwhile for anyone to do with unspecialized labor, then it would certainly be worth doing for a specialist 'Anyone' could

> It certainly seems like if it's worthwhile for anyone to do with unspecialized labor, then it would certainly be worth doing for a specialist 'Anyone' could be a penniless student and his time costs little, specialist may charge $40 per hour. Also even ideal free market has cost of transaction, discoveravility, etc. Hospitals have repair technicians, but why would you need one spesifically focusing on power supplies - he does not need different training or equipment